Improvement in service coupler-pipes



w. WW m M mf M MJ D m.. M l wm m. h L .v. e m S T MW l s 3, m WM 2/ 0 Na N ,wf/w

im ivi' NITED STATES PATENT Granen.

LEONARD S. CHAPMAN, OF WASHINGTON, DISTRICT OF COLUMBIA.`

iMPROVEMENT 'IN SERVICE COUPLER-PIPES.

Speciiication forming part of Letters Patent No. 160,305., dated March2, 1875; application filed December 30, 1874.

To all whom yit may concern:

Be it known that I, LEONARD S. CHAPMAN, of Washington, in the county ofWashington and District of Columbia, have invented a new and valuableImprovementl in Service Uoupler-Pipe; and I do hereby declare that thefollowing is a full, clear, and exact'deseription of the constructionand operation of the same, reference being had to the annexed drawingsmaking a part of this specication, and to the letters and figures ofreference marked thereon.

.Figure l of the drawingsis a representation of a plan view of mydevice, showing the reservoir portion, and two arms or transverseportions. Fig. 2 is a longitudinal middle section of the same, showing`the bores of the transverse and the reservoir-chamber. Fig. 3 is a sideview of Jche transverse portion, showing the outside swell from the endstoward the middle, top, and bottom. Fig. 4 is a longitudinal middlesection of the saine, showing the said inside swell, and looking'through the reservoir-chamber toward its outlet.

My invention is a service coupler-pipe; and consists in the novelconstruction and operation of the same, for the purpose of producing twocurrents of water in any one branch main, which shall converge toward aservicepipe, providing said branch main is connected in the usual mannerwith other branch mains, whereby it receives a supply of water into bothof its ends at the same time, thereby largely increasing the volume ofsupply through said pipe, and adding greatly to the force of the sametoward and through the outlets of discharge of such devices as hydrants,street-washers, or re-plugs, all of which is hereinafter more fullydescribed and illustrated by the accompanying drawings, in which thesame letters designate identical parts of my device, in the differentfigures respectively.

The letter A represents that part of my device which is a little overdouble the caliber, and at least double the length of the other twoparts or arms B and O, taken together. Said pipe is made of any suitablemetal, cast or otherwise, of any suitable thickness of shell, and of a Tform 5 the transverse portion or arms B and O, having the bores b and cat their outer ends, otl continuous and exactly corresponding size tothe water-main which is tapped, and with which the service pipe isconnected by said coupler. The portion A is directly coupled in theusual way, With the service-pipe and the arms B and O, respectively withthe said water-main. This is done by means of the usual collar d, on theend of the arm B, and by having the ends e and f of the portions A and Oso formed as to easily lit within the usual collars of the service andmain pipe respectively.

The bores b and c of the said transverse portion of my coupler turneachfby an easy curve, g, into the chamber a, Within the part A; andeach is also gradually swelled in size toward the point h, the outershell of said bores also correspondingly swelling, so that they shalltogether become gradually enlarged into the caliber of the saidreservoir-chamber a, said construction serving to produce two constantcurrents of water, from opposite directions, in any main, which shallconverge toward and into said chamber a, thereby largely increasing thevolume of supply ready for discharge through the outlet e into anyaforesaid servicepipe.

The chamber a is gradually narrowed in, as shown, toward the outlet e,the shell also correspondingly formed, for the purpose of convenientlyjoining as aforesaid the coupler with the service-pipe, and ofcompressing the column of water in the said chamber, when it shall owthrough the outlet e into said service-pipe. This compression increasesthe velocity (hence the momentum) of the ilow, so that the column ofwater in the chamber a is discharged through the aforesaid nal outletswith an increased force, without decreasing in the least its volume.Hence, double currents as aforesaid being first produced in thewater-main to converge into the said chamber a, said largely increasedvolume of Water is then ejected through the outlets of discharge, notonly without any sensible diminution but with a largely-in creasedforce.

Therefore, What I claim as my invention, and desire to secure by LettersPatent, is-

A service coupler-pipe.A B O, consisting essentially of the transversebores b c, swellhereunto subscribed my name in the presence ing fromtheir outer ends toward the middle of two Witnesses.

and point of conjunction h into the caliber of the reservoir-chamber a,which is narrowed at LEONARD s CHAPMAN' its outlet e, substantially asand for the pur- Vitnesses: poses specified. E. C. WEAVER,

In testimony that I claim the above I have CHAS. B. STEELE.

